Local assessment officials
Our webpages for local assessment officials include information and tools for assessors, county real property tax (RPT) directors, and other local government officials. Scroll down to our menus to get started.
Welcome new assessors and county RPT directors!
This quick reference guide will help you get started. Congratulations and welcome aboard!
Online Assessment Community (OAC) login
The OAC is a secure website made available by the Office of Real Property Tax Services (ORPTS) to county RPT directors, assessors, and their staff.
Local assessment officials Resources
ORPTS Products
- Real Property System information center
- STAR information for local officials
- Equalization rates
- Agricultural assessment information
- State aid
- State-owned land overview
- Residential assessment ratios
- School district income verification
- Special equalization ratios
- Equalization for coordinated assessment programs
- Property tax cap
- Appraisal methodology for solar and wind energy projects
- Value analysis tools
ORPTS Services
- ORPTS customer service teams
- Training
- Reassessment resources
- Property tax and assessment news
- State Board of Real Property Tax Services
- Managing real property transfer data for local assessment officials
- Improving the effectiveness and efficiency of RPT administration
- ORPTS regional offices
- Pre-decisional collaboration
- Utility valuation
- Forest valuation
- Exemption reporting
- Sales Web (now in the Municipal Data Portal)
ORPTS Library
- Municipal profiles (now in the Municipal Data Portal)
- RPT forms by subject or by number
- Property tax publications
- Legal information
- Property class codes
- Assessment Community Weekly archive
- Assessor manuals
- Current status of property tax-related legislation
- 2023 changes and guidance for 467 and 459-c
- SWIS code list
- Educating the public
- Assessor report instructions
- Rate complaints and procedures
- Aspera SendVault instructions
Recent RPSV4 updates
To install the most recent RPSV4 updates, visit RPSV4 Updates in the Online Assessment Community.
October 14, 2025
421-q and 485-y exemptions: RPS2020_7314.exe and db_797.exe
May 16, 2025
Judicial Security Act tax fees correction: RPS2020_6806.exe
April 18, 2025
STAR maximum exemption savings: Star_Cap_2025.exe
Updated: